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Rule2025-18636

Finding of Failure To Attain the 1997 8-Hour Ozone Standards; California; San Joaquin Valley

Primary source

Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.

Published
September 25, 2025
Effective
October 27, 2025

Issuing agencies

Environmental Protection Agency

Abstract

The Environmental Protection Agency (EPA) has determined that the San Joaquin Valley, California area failed to attain the 1997 8- hour ozone national ambient air quality standard (NAAQS) by its June 15, 2024 "Extreme" area attainment date. This determination is based on quality-assured and certified ambient air quality monitoring data from 2021 through 2023. As a result of this determination, the State of California is required to implement nonattainment contingency measures and the stationary source fee program required under Clean Air Act (CAA) section 185.

Indexed from Federal Register on September 25, 2025.

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.